Improvement in method of strengthening bobbins or spools



A. HALLOWELL. V v"METHOD oF STRENGTHING B oBBINs 0R sPooLs.

- No. 100,754; y Patented Man 15, 1a 7o.

Tub. Ll

- ritniird tatre LBiiRT HALLOWELL, 'or LOWELL, MASSACHUSETTS, Assicnoaronin! snLr; anni, '11. ArrHnnroN, AND ynonnen fr. DURGIN, or SAME PLACE;

Leners Patna Nn. 100,754, `daad vMath, 15,' 1870.

IMPROVEMENT ME'rHo'D. or STRENGTHENING BoBBINs on sPooLs.

The Schedine referred :to in these Letters Pabenb and making parent' thesame To all whom it may conce-ral- Be it known that I, ALBERT'HALLOWELL,of Lowell, in the county of Middlesex, and State of Massachusetts, haveinvented ,certain new and useful lmprovements in Bobbins or Spools,offwhich the following is a full, clearand enactI description, referencebeing had to the accompanying drawings making part of thisspecification, in whichy Figures 1,52, and 3 represent each. a centralsectional elevation. y i

Figures 4 and 5 represent-each an end vleiv.

This invention hasfor its-object to cover or partly cover, ,and tostrengthen4 and protect one oribothof the heads or ends of the bobbin orspool, thereby pre` venting splits, cracks, or roughness, whichmaterially injure or spoilthe bobbinbeibre it is half worn.`

This invention consists in the method,substantially as described, ofstrengthening, protecting, and preserving one or both `ends or' heads ofthe bobbin or` spool, by means of a metal hoop, hand, or ring, a, orthat and a' protecting plate; c, combined, and either of these cast ontothe head or end, and i'n'to an annular groove previously formed in thesubstance 'of the bobhilL or spool for the reception of the metal,which, while in a melted state, tillstliegroove and ,forms thestrengthening ring, which slninks',iin cooling, binds the wood andprevents it splitting and protects it.

To apply this ring or hoop tothe head or end of the hobbin, afterturning the groove, the head or end which is to be hooped, or hooped andplated is placed in a common metal mold, hinged or pinned together inthe usual way. ,A

Some portion of the mold A must lit some part of i the bobbin, say thebarrel B, leaving a suicient open spacebetween the interior-.of the moldand the exterior of the head or end to be filled with melted metal andform the' ring, or that, and the plate combined.

The metal is poured into the mold through a 'suit'af ble gate, fillingthe open space in the mold above re ferred to,'and forming' the desiredring or'ring-and plate combined, ally as clearly shown in the drawingslvThe mold isthen opened, the bobbin' removed, and any surplus metalremoved in the usual way of turning or otherwise finishing the ring, orthat and the plate, to the desired degree of thickness, form, orsmoothness.

The metal nsedto cast the ring or the ring and plate must bethat-willich is'fusible at a 10W' degree oi' heat, dso as not to burnthewood, and I generally use a composition of tin, z'inc,andl bismnth, orthat which is known by persons skilled in the art of casting in moldsaswhite-metal, which isA equally as good. In fact,'any metal which meltsat a low temperature will answer the purpose described; but iron,copper, brass, or 'such metals as require a highdegree of heat to meltthem, will not answer the purpose.

External grooves gmay be cast inthe metal hoop or plating, to serve thepurpose of holding the bobbin onto theshnttle-spindle or for any purposedes'lhed..

, In all-cases I cast the metalinto an annular groove, as shown, so asto .hold the ring orthe ring and plate firmly on the head or end of thebobbin or spool.

I claim the method, substantially as described, of

